Mainspring
Mainspring Energy manufactures the Linear Generator, a power generation system that converts various fuels into low-emission, on-site electricity.
Secondary Market Price
How Mainspring Measures Up
To help you manage your Mainspring equity, Prospect has run the company through our machine learning model.
Prospect Rating
This rating reflects our belief in this company's potential to grow to that many times its current value in 4 years. For an employee with stock, this rating suggests a potential return on equity, but it also comes with some risk.
Exit Risk
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Our rating is a reflection of the likelihood of this company achieving a liquidity event for its employees based on the quality of investors, funding stage, founders, and more.
Funding Stage
Series F
A company’s funding stage reflects how established it is, how quickly it is scaling, and the average impact an employee may have when joining.
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Prospect Projected Future Mainspring Prices
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Company Description
Mainspring Energy, formerly known as EtaGen, manufactures the Mainspring Linear Generator, a power generation technology for on-site use. The company serves customers in the utility, data center, enterprise, and industrial sectors by providing modular power solutions intended to improve grid reliability and reduce emissions. The generators are fuel-flexible, capable of running on natural gas and designed to transition to cleaner fuels like green hydrogen and ammonia as they become more available. Mainspring Energy was founded in 2010 by Shannon Miller, Matt Svrcek, and Adam Simpson, originating from research at Stanford University’s Advanced Energy Systems Lab.
The company plans to continue scaling the deployment of its linear generators while participating in policy discussions to advance their adoption. Recent developments include the inclusion of linear generators in California's Renewable Portfolio Standard (RPS) Guidebook, which allows electricity generated with renewable fuels to be certified for renewable energy credits. Similarly, the state of New Jersey has officially recognized linear generators as an advanced, low-carbon technology in its updated Energy Master Plan. Mainspring is also engaging with the Federal Energy Regulatory Commission (FERC) on regulations for large load interconnections, working with data centers and utilities to provide alternatives to traditional backup power.
- General Catalyst
- Amazon Climate Pledge Fund
- DCVC
- Temasek
- Marunouchi Innovation Partners
- M&G Investments
- Pictet Group
- Lightrock
- LGT Bank
- Khosla Ventures
- Gates Frontier
- Devonshire Investors
- Princeville Capital
- 40 North Ventures
- Chevron Technology Ventures
- Bill Gates
- ClearSky
- AEP
- KCK
- Equinor
- Shell Ventures
- Hanwha Power Systems
- Canada Pension Plan Investment Board
- Co-Founder, Shannon Miller
- Co-Founder, Matt Svrcek
- Co-Founder, Adam Simpson
Peer Group Comparison
Vs Peer Group of >$4B Startups
Frequently Asked Questions
Joining Anduril as an employee is another way to acquire equity, typically through stock options included in compensation packages.
Is Mainspring worth joining?
Evaluating an offer from a private company like Mainspring requires a careful look at its future potential and how its equity package fits into your financial goals. Platforms like Prospect can help you model the future value of your equity compensation to better understand the opportunity.
What should I do with my Mainspring stock?
Deciding what to do with private company stock, such as exercising options or selling shares, depends on your individual financial situation and tax implications. You can use a platform like Prospect to develop a personalized strategy for managing your equity, including when to exercise options and how to plan for taxes.
Can you sell Mainspring stock?
As Mainspring is a private company, selling stock is typically restricted and only possible during specific events like tender offers or on secondary markets. Prospect offers tender offer tools to help you decide how much to sell and which shares are the most tax-optimal to offload.
How can I find the value of my Mainspring stock?
The value of stock in a private company like Mainspring isn't publicly listed and is determined by factors like its 409A valuation and secondary market transactions. To help you understand its potential, Prospect provides predictive models that project the future value of your shares based on proprietary data.
What is Mainspring's equity worth?
The precise worth of Mainspring's equity is not public information, as its valuation is typically only updated during funding rounds or other liquidity events. You can use tools from a platform like Prospect to forecast your personal equity value and model different financial scenarios.
What is Mainspring's stock ticker symbol?
Mainspring is a private company, so it does not have a stock ticker symbol and is not traded on a public stock exchange. Ticker symbols are only assigned to companies when they go public through an Initial Public Offering (IPO).
Can I buy or sell Mainspring stock?
Buying stock in a private company like Mainspring is generally limited to accredited investors or employees, while selling is often restricted to company-approved liquidity events. If you are an employee looking to sell, platforms like Prospect can help you navigate the process by optimizing for taxes and timing.
What is the criteria to buy or invest in Mainspring stock?
Investing in a private company like Mainspring is typically reserved for venture capital firms and accredited investors who meet specific income or net worth thresholds. Employees may also receive equity as part of their compensation, and resources like Prospect are designed to help them manage that specific asset.
